US4025164A - Liquid crystal display device for colored display of information with a selective polarizer - Google Patents
Liquid crystal display device for colored display of information with a selective polarizer Download PDFInfo
- Publication number
- US4025164A US4025164A US05/660,986 US66098676A US4025164A US 4025164 A US4025164 A US 4025164A US 66098676 A US66098676 A US 66098676A US 4025164 A US4025164 A US 4025164A
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- US
- United States
- Prior art keywords
- blue
- benzo
- yellow
- green
- orange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133533—Colour selective polarisers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/02—Liquid crystal materials characterised by optical, electrical or physical properties of the components, in general
- C09K19/0208—Twisted Nematic (T.N.); Super Twisted Nematic (S.T.N.); Optical Mode Interference (O.M.I.)
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/60—Pleochroic dyes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/02—Function characteristic reflective
Definitions
- the present invention is concerned with a liquid crystal display device for colored display of information with a reflector and a twisted nematic liquid crystal cell located between a linear and a selective polarizer and a method of fabricating the same.
- the selective polarizer is situated between the reflector and the twisted nematic liquid crystal cell and consists of polarizer sheets in which various pleochroic dyes are embedded in an oriented manner. The two sheets here are rotated with respect to one another.
- the linear polarizer is disposed between the twisted nematic liquid crystal cell and the light source or the observer. In such devices, however, the controlled segments have dark borders.
- This aim of the invention is satisfied by locating the selective polarizer in front of the twisted nematic liquid crystal cell and the linear polarizer between the twisted nematic liquid crystal cell and the reflector.
- Such devices display the information on a surprisingly bright and uniformly illuminated display surface.
- the color effect of the display is greatly enhanced by the brightness and uniform illumination of the display face.
- a selective polarizer consisting of at least two sheets with their preferred directions turned at most 90° to one another and having dichroic dyes imbedded in the sheets.
- Devices provided with such selective polarizers are distinguished by spectacular color rendition, especially when suitable dichroic dyes are used.
- preferred direction is meant here a preferred direction of the optimum anisotropy, which in polarizing sheets produced by stretching runs parallel to the direction of stretching.
- the device of the invention be furnished with a selective polarizer having only a single polarizing sheet in which, however, are embedded several dyes, of which at least one is dichroic.
- a selective polarizer having only a single polarizing sheet in which, however, are embedded several dyes, of which at least one is dichroic.
- a single-color display like colored symbols on a white (colorless) background or white (colorless) symbols on a colored background, it is sufficient to use a selective polarizer of only one polarizing sheet in which only one dichroic dye is embedded.
- the display face of the device of the invention is outstandingly brilliant in color when the dichroic dyes tabulated at the end of the specification are used in the selective polarizer.
- a liquid crystal display device for the colored display of information with a reflector and a twisted nematic liquid crystal cell placed between a linear polarizer and a selective polarizer wherein the selective polarizer is disposed in front of the twisted nematic liquid crystal cell and the linear polarizer is disposed between the twisted nematic liquid crystal cell and the reflector.
- FIGS. 1a and 1b show the construction and ray path of a device conforming to the invention, the color observed in design a) being determined essentially by the polarizer sheet 3, and the color observed in design b) being determined essentially by the polarizer sheet 4.
- FIGS. 2a and 2b show a device for producing colored and stretched polarizing sheets.
- FIG. 3 gives the transmission spectra of a selective polarizer with a blue and an orange colored polarizing sheet, the preferred directions of the stretching of which are turned 90° to one another, the direction of vibration of the incident polarized light in curve 1 being parallel to the preferred direction of the blue polarizing sheet and in curve 2, to that of the orange polarizing sheet.
- FIG. 4 gives the transmission spectra of a selective polarizer which has only one polarizing sheet, a red and yellow colored polarizing sheet, where in curve 1 the direction of vibration of the incident polarized light is parallel to the preferred direction of the stretching of the polarizing sheet and in curve 2 is perpendicular thereto.
- FIGS. 1a and 1b there is a light source 1, the white unpolarized light of which passes through a selective polarizer 2 composed of two polarizing sheets 3 and 4, whereby it is split into two differently colored beams polarized perpendicularly to one another. These two beams then pass through the twisted nematic liquid crystal cell and one or the other is absorbed in the adjacent neutral linear polarizer 6, depending on whether the twisted nematic liquid crystal cell is switched on or off. The colored beam which is not absorbed is reflected at reflector 7, passes unhindered through the neutral polarizer 6, the twisted nematic liquid crystal cell 5 and the selective polarizer 2 and is perceived as colored light by the observer 8.
- the selective polarizer 2 comprises the two polarizing sheets 3 and 4 each consisting of polyvinylalcohol (PVA) and an embedded dichroic dye.
- PVA polyvinylalcohol
- the polarizing sheets are made by stretching and dyeing a PVA film.
- FIGS. 2a and b A device for stretching such a PVA film is shown in FIGS. 2a and b.
- the reference numbers 9 and 10 indicate the opposed clamping members in which an approximately 30 mm long, 60 mm wide and 50 ⁇ thick PVA film 11 is clamped.
- the member 9 is attached on one side to two parallel guide-rods 12 and 13, while the member 10 slides along the rods.
- the stretching device of FIG. 2a is placed in a cold water bath and the PVA film stretched to about six or seven times its original length by slow movement of the clamping member 10 in the direction of the arrow for about three hours.
- the appearance of such a stretched film 11 is indicated in FIG. 2b.
- By the stretching of the film 11 in the direction of the arrow it acquires a preferred direction, which is indicated by the parallel lines on the film 11 and on the sheets 3 and 4 of the device in FIGS. 1a and b.
- the device of FIG. 2b By dipping the device of FIG. 2b for 0.5 to 5 minutes in a dye bath with about 0.1 weight percent of dichroic dye there is produced a more or less strong, depending on the dye used, embedding of dye molecules in the stretched PVA film. After being washed with distilled solvent, usually water, and subsequent drying in air, the colored PVA film is perfectly rigid and can then be removed from the device and cut to size for polarizer sheets.
- the twisted nematic liquid crystal cell 5 corresponds in structure and operation to that in DT-OS No. 2,158,563 and therefore is shown only schematically in FIGS. 1a and b by two transparent electrodes, the directions of which are turned 90° to one another, as well as by a few molecules of the liquid-crystal substance indicated by dashes.
- a control voltage U is applied to the electrodes to establish the electric field for orienting the liquid-crystal molecules.
- the polarizer 6 is a neutral, non-color-selective linear polarizer.
- the reflector 7 consists of an aluminum or silver coating on a supporting plate.
- a blue polarizing sheet 3 and an orange polarizing sheet 4 were used in the selective polarizer.
- CIBA cuprophenyl blue GL was embedded in sheet 3 as the dichroic dye and Searle benzorubin R in sheet 4.
- the two sheets were so arranged in the display device that their preferred directions produced by stretching the PVA film were turned 90° to one another and the preferred direction of sheet 3 ran parallel to that of the linear polarizer 6.
- FIG. 1a the device allows blue light to reach the observer and in FIG. 1b, orange light.
- Curves 1 and 2 of FIG. 3 give the spectral distribution of the light in the two cases.
- Unpolarized white light passes through the polarizer 2 and is thereby split into a vertically polarized blue beam and a horizontally polarized orange beam.
- the polarization directions of the two beams are rotated through 90° in passing through the twisted nematic liquid crystal cell 5 so that now the blue beam is horizontally polarized and the orange beam is vertically polarized.
- the orange beam is totally absorbed by the neutral polarizer 6 while the blue beam is transmitted.
- the blue beam is then reflected at the mirror 7 and transmitted by the neutral polarizer 6.
- its direction of polarization is again rotated by 90°, thus becoming vertical.
- the blue beam then passes unhindered through the selective polarizer 2 and is perceived by the observer 8 as blue light.
- the liquid-crystal molecules orient themselves in such a way that the planes of polarization of the colored light beams are not rotated and now the blue beam remains vertically polarized and is completely absorbed in the neutral polarizer 6 while the orange beam passes unhindered through neutral polarizer 6.
- the orange beam is reflected at the mirror 7, passes unhindered through the neutral polarizer 6, the twisted nematic liquid crystal cell 5, the selective polarizer 2 and is perceived by the observer 8 as orange light.
- the complementary effect can be produced by rotating either the selective polarizer 2 or the linear polarizer 6 through 90°.
- a further embodiment of the invention consists of a device for the two-color display of information which has for its selective polarizer 3 just a single polarizer sheet, in which, however, at least two different dichroic dyes are embedded.
- Such sheets can be produced as previously described by stretching in a cold water bath and then embedding dichroic dye.
- Two-color sheets are obtained either by treatment in a dye bath containing two dyes or by successive coloring in two dye baths, each containing one of the dyes.
- FIG. 4 gives the transmission spectra of a selective polarizer with a single polarizing sheet in which, however, Hochst diamine red 8B was embedded in a first 0.1% dye bath and Fluka quinoline yellow in a second 0.6% bath.
- curve 1 shows the transmission as a function of the wavelength ⁇ in ( ⁇ m) of incident white polarized light, the direction of polarization of which is parallel to the preferred direction of the stretching of the PVA film.
- Curve 2 is again the transmission curve of the sheet when the preferred direction of the stretching of the PVA film and the direction of polarization of the incident light are mutually perpendicular.
- the complementary effect can be produced by rotating the selective polarizer 2 or the linear polarizer 6 by 90°.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH335275A CH582894A5 (zh) | 1975-03-17 | 1975-03-17 | |
CH3352/75 | 1975-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4025164A true US4025164A (en) | 1977-05-24 |
Family
ID=4254114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/660,986 Expired - Lifetime US4025164A (en) | 1975-03-17 | 1976-02-24 | Liquid crystal display device for colored display of information with a selective polarizer |
Country Status (4)
Country | Link |
---|---|
US (1) | US4025164A (zh) |
JP (1) | JPS51122397A (zh) |
CH (1) | CH582894A5 (zh) |
DE (2) | DE2515339A1 (zh) |
Cited By (66)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4097130A (en) * | 1977-03-11 | 1978-06-27 | General Electric Company | Multi-colored liquid crystal displays |
US4141627A (en) * | 1977-01-06 | 1979-02-27 | Rca Corporation | Electro-optic device |
US4188094A (en) * | 1978-02-15 | 1980-02-12 | Fergason James L | Liquid crystal display having light indicia on a dark background |
US4211473A (en) * | 1978-04-12 | 1980-07-08 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal display devices |
US4416514A (en) * | 1980-11-10 | 1983-11-22 | Polaroid Corporation | Color filter |
US4497543A (en) * | 1980-06-28 | 1985-02-05 | Hosiden Electronics Co., Ltd. | Liquid crystal display with colors from dye and polarizer mixed |
US4533214A (en) * | 1981-09-21 | 1985-08-06 | Texas Instruments Incorporated | Biaxial substrates in light modulating devices |
US4611889A (en) * | 1984-04-04 | 1986-09-16 | Tektronix, Inc. | Field sequential liquid crystal display with enhanced brightness |
US4617562A (en) * | 1983-04-11 | 1986-10-14 | Klotz Dell E | Multicolored liquid crystal display |
US4635051A (en) * | 1983-09-26 | 1987-01-06 | Tektronix, Inc. | High-speed electro-optical light gate and field sequential full color display system incorporating same |
US4674841A (en) * | 1985-03-08 | 1987-06-23 | Tektronix, Inc. | Color filter switchable among three state via a variable retarder |
EP0237160A1 (en) * | 1986-02-05 | 1987-09-16 | Ford Motor Company Limited | Multicolor liquid crystal display system |
US4758818A (en) * | 1983-09-26 | 1988-07-19 | Tektronix, Inc. | Switchable color filter and field sequential full color display system incorporating same |
US4867536A (en) * | 1986-02-05 | 1989-09-19 | Ford Motor Company | Color selectable liquid crystal display system |
US4927240A (en) * | 1983-11-02 | 1990-05-22 | Michael Stolov | Multiple liquid crystal display |
US5122890A (en) * | 1987-11-06 | 1992-06-16 | Makow David M | Electro-optic animated displays and indicators employing electro-optical cells and mosaic segment polarizer |
US5189534A (en) * | 1988-03-24 | 1993-02-23 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal color displays which cool from isotropic to twisted nematic to smectic |
US5347378A (en) * | 1991-04-04 | 1994-09-13 | Displaytech, Inc. | Fast switching color filters for frame-sequential video using ferroelectric liquid crystal color-selective filters |
US5387920A (en) * | 1983-09-26 | 1995-02-07 | Tektronix Inc. | Switchable color filter and field sequential full color display system incorporating same |
US5682180A (en) * | 1990-06-08 | 1997-10-28 | General Motors Corporation | Multi-color electronic display utilizing opponent colors |
US5751384A (en) * | 1995-05-23 | 1998-05-12 | The Board Of Regents Of The University Of Colorado | Color polarizers for polarizing an additive color spectrum along a first axis and it's compliment along a second axis |
US5892559A (en) * | 1996-11-25 | 1999-04-06 | Colorlink, Inc. | Chromaticity compensating liquid crystal filter |
US5929946A (en) * | 1995-05-23 | 1999-07-27 | Colorlink, Inc. | Retarder stack for preconditioning light for a modulator having modulation and isotropic states of polarization |
US5990996A (en) * | 1996-05-14 | 1999-11-23 | Colorlink, Inc. | Color selective light modulators employing birefringent stacks |
US5999240A (en) * | 1995-05-23 | 1999-12-07 | Colorlink, Inc. | Optical retarder stack pair for transforming input light into polarization states having saturated color spectra |
US6049367A (en) * | 1995-05-23 | 2000-04-11 | Colorlink, Inc. | Polarization manipulating device modulator with retarder stack which preconditions light for modulation and isotropic states |
US6108131A (en) * | 1998-05-14 | 2000-08-22 | Moxtek | Polarizer apparatus for producing a generally polarized beam of light |
US6122103A (en) * | 1999-06-22 | 2000-09-19 | Moxtech | Broadband wire grid polarizer for the visible spectrum |
US6122028A (en) * | 1997-10-17 | 2000-09-19 | Sharp Kabushiki Kaisha | Reflective liquid crystal device with polarizing beam splitter |
US6183091B1 (en) | 1995-04-07 | 2001-02-06 | Colorlink, Inc. | Color imaging systems and methods |
US6204904B1 (en) * | 1996-10-31 | 2001-03-20 | Sharp Kabushiki Kaisha | Reflective liquid crystal device |
US6208463B1 (en) | 1998-05-14 | 2001-03-27 | Moxtek | Polarizer apparatus for producing a generally polarized beam of light |
US6234634B1 (en) | 1999-07-28 | 2001-05-22 | Moxtek | Image projection system with a polarizing beam splitter |
US6243199B1 (en) | 1999-09-07 | 2001-06-05 | Moxtek | Broad band wire grid polarizing beam splitter for use in the visible wavelength region |
US6252638B1 (en) | 1995-05-23 | 2001-06-26 | Colorlink, Inc. | Color controllable illumination device, indicator lights, transmissive windows and color filters employing retarder stacks |
US6273571B1 (en) | 1995-05-23 | 2001-08-14 | Colorlink, Inc. | Display architectures using an electronically controlled optical retarder stack |
US6288840B1 (en) | 1999-06-22 | 2001-09-11 | Moxtek | Imbedded wire grid polarizer for the visible spectrum |
US6320632B1 (en) * | 1998-06-30 | 2001-11-20 | Nippon Mitsubishi Oil Corporation | Color reflection type polarizer |
USRE37509E1 (en) * | 1986-04-03 | 2002-01-15 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britian And Northern Ireland | Smectic liquid crystal devices |
US6417892B1 (en) | 1995-05-23 | 2002-07-09 | Colorlink, Inc. | Color filters, sequencers and displays using color selective light modulators |
US6447120B2 (en) | 1999-07-28 | 2002-09-10 | Moxtex | Image projection system with a polarizing beam splitter |
US6666556B2 (en) | 1999-07-28 | 2003-12-23 | Moxtek, Inc | Image projection system with a polarizing beam splitter |
US6707516B1 (en) | 1995-05-23 | 2004-03-16 | Colorlink, Inc. | Single-panel field-sequential color display systems |
US20040125449A1 (en) * | 2002-12-30 | 2004-07-01 | Sales Tasso R. | Grid polarizer with suppressed reflectivity |
US6785050B2 (en) | 2002-05-09 | 2004-08-31 | Moxtek, Inc. | Corrosion resistant wire-grid polarizer and method of fabrication |
US6882384B1 (en) | 1995-05-23 | 2005-04-19 | Colorlink, Inc. | Color filters and sequencers using color selective light modulators |
US20050206847A1 (en) * | 1999-07-28 | 2005-09-22 | Moxtek, Inc. | Image projection system with a polarizing beam splitter |
US20060033976A1 (en) * | 2002-01-07 | 2006-02-16 | Xiang-Dong Mi | Display apparatus with two polarization compensators |
US20060119937A1 (en) * | 2004-12-06 | 2006-06-08 | Moxtek, Inc. | Multilayer wire-grid polarizer |
US20060203164A1 (en) * | 2002-01-07 | 2006-09-14 | Moxtek, Inc. | Display with a wire grid polarizing beamsplitter |
US7375887B2 (en) | 2001-03-27 | 2008-05-20 | Moxtek, Inc. | Method and apparatus for correcting a visible light beam using a wire-grid polarizer |
US7630133B2 (en) | 2004-12-06 | 2009-12-08 | Moxtek, Inc. | Inorganic, dielectric, grid polarizer and non-zero order diffraction grating |
US20100128347A1 (en) * | 2008-11-19 | 2010-05-27 | Herb He Huang | Polarizing cube and method of fabricating the same |
US7789515B2 (en) | 2007-05-17 | 2010-09-07 | Moxtek, Inc. | Projection device with a folded optical path and wire-grid polarizer |
US7800823B2 (en) | 2004-12-06 | 2010-09-21 | Moxtek, Inc. | Polarization device to polarize and further control light |
US7961393B2 (en) | 2004-12-06 | 2011-06-14 | Moxtek, Inc. | Selectively absorptive wire-grid polarizer |
US8248696B2 (en) | 2009-06-25 | 2012-08-21 | Moxtek, Inc. | Nano fractal diffuser |
US8611007B2 (en) | 2010-09-21 | 2013-12-17 | Moxtek, Inc. | Fine pitch wire grid polarizer |
US8755113B2 (en) | 2006-08-31 | 2014-06-17 | Moxtek, Inc. | Durable, inorganic, absorptive, ultra-violet, grid polarizer |
US8873144B2 (en) | 2011-05-17 | 2014-10-28 | Moxtek, Inc. | Wire grid polarizer with multiple functionality sections |
US8913321B2 (en) | 2010-09-21 | 2014-12-16 | Moxtek, Inc. | Fine pitch grid polarizer |
US8913320B2 (en) | 2011-05-17 | 2014-12-16 | Moxtek, Inc. | Wire grid polarizer with bordered sections |
US8922890B2 (en) | 2012-03-21 | 2014-12-30 | Moxtek, Inc. | Polarizer edge rib modification |
US9348076B2 (en) | 2013-10-24 | 2016-05-24 | Moxtek, Inc. | Polarizer with variable inter-wire distance |
US20170242296A1 (en) * | 2016-02-22 | 2017-08-24 | Samsung Electronics Co., Ltd. | Color polarizing film, antireflective film and display device |
CN107102391A (zh) * | 2016-02-22 | 2017-08-29 | 三星电子株式会社 | 彩色偏振膜、抗反射膜、以及显示装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4241984A (en) * | 1979-06-04 | 1980-12-30 | Timex Corporation | Simplified field effect, twisted nematic liquid crystal display construction |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3806227A (en) * | 1972-09-06 | 1974-04-23 | Siemens Ag | Arrangement for a multi-color data indication |
US3972587A (en) * | 1973-12-21 | 1976-08-03 | Bbc Brown Boveri & Company Limited | Liquid crystal display |
-
1975
- 1975-03-17 CH CH335275A patent/CH582894A5/xx not_active IP Right Cessation
- 1975-04-09 DE DE19752515339 patent/DE2515339A1/de not_active Ceased
- 1975-04-09 DE DE7511033U patent/DE7511033U/de not_active Expired
-
1976
- 1976-02-24 US US05/660,986 patent/US4025164A/en not_active Expired - Lifetime
- 1976-03-15 JP JP51028027A patent/JPS51122397A/ja active Pending
Patent Citations (2)
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US3806227A (en) * | 1972-09-06 | 1974-04-23 | Siemens Ag | Arrangement for a multi-color data indication |
US3972587A (en) * | 1973-12-21 | 1976-08-03 | Bbc Brown Boveri & Company Limited | Liquid crystal display |
Non-Patent Citations (1)
Title |
---|
Scheffer: "New Multicolor liquid crystal displays that use a twisted-nematic electro-optical cell," J. App. Phys., vol. 44, pp. 4799-4803, Nov. 1973. * |
Cited By (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4141627A (en) * | 1977-01-06 | 1979-02-27 | Rca Corporation | Electro-optic device |
US4097130A (en) * | 1977-03-11 | 1978-06-27 | General Electric Company | Multi-colored liquid crystal displays |
US4188094A (en) * | 1978-02-15 | 1980-02-12 | Fergason James L | Liquid crystal display having light indicia on a dark background |
US4211473A (en) * | 1978-04-12 | 1980-07-08 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal display devices |
US4497543A (en) * | 1980-06-28 | 1985-02-05 | Hosiden Electronics Co., Ltd. | Liquid crystal display with colors from dye and polarizer mixed |
US4416514A (en) * | 1980-11-10 | 1983-11-22 | Polaroid Corporation | Color filter |
US4533214A (en) * | 1981-09-21 | 1985-08-06 | Texas Instruments Incorporated | Biaxial substrates in light modulating devices |
US4617562A (en) * | 1983-04-11 | 1986-10-14 | Klotz Dell E | Multicolored liquid crystal display |
US4635051A (en) * | 1983-09-26 | 1987-01-06 | Tektronix, Inc. | High-speed electro-optical light gate and field sequential full color display system incorporating same |
US5714970A (en) * | 1983-09-26 | 1998-02-03 | Tektronix, Inc. | Switchable color filter using electrically controllable optical retarders |
US4758818A (en) * | 1983-09-26 | 1988-07-19 | Tektronix, Inc. | Switchable color filter and field sequential full color display system incorporating same |
US5387920A (en) * | 1983-09-26 | 1995-02-07 | Tektronix Inc. | Switchable color filter and field sequential full color display system incorporating same |
US4927240A (en) * | 1983-11-02 | 1990-05-22 | Michael Stolov | Multiple liquid crystal display |
US4611889A (en) * | 1984-04-04 | 1986-09-16 | Tektronix, Inc. | Field sequential liquid crystal display with enhanced brightness |
US4674841A (en) * | 1985-03-08 | 1987-06-23 | Tektronix, Inc. | Color filter switchable among three state via a variable retarder |
US4867536A (en) * | 1986-02-05 | 1989-09-19 | Ford Motor Company | Color selectable liquid crystal display system |
EP0237160A1 (en) * | 1986-02-05 | 1987-09-16 | Ford Motor Company Limited | Multicolor liquid crystal display system |
USRE37509E1 (en) * | 1986-04-03 | 2002-01-15 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britian And Northern Ireland | Smectic liquid crystal devices |
US5122890A (en) * | 1987-11-06 | 1992-06-16 | Makow David M | Electro-optic animated displays and indicators employing electro-optical cells and mosaic segment polarizer |
US5189534A (en) * | 1988-03-24 | 1993-02-23 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal color displays which cool from isotropic to twisted nematic to smectic |
US5682180A (en) * | 1990-06-08 | 1997-10-28 | General Motors Corporation | Multi-color electronic display utilizing opponent colors |
US5347378A (en) * | 1991-04-04 | 1994-09-13 | Displaytech, Inc. | Fast switching color filters for frame-sequential video using ferroelectric liquid crystal color-selective filters |
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Also Published As
Publication number | Publication date |
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DE2515339A1 (de) | 1976-09-30 |
DE7511033U (de) | 1977-04-07 |
JPS51122397A (en) | 1976-10-26 |
CH582894A5 (zh) | 1976-12-15 |
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